.flex {
  display: flex;
}
.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.flex-column {
  display: flex;
  flex-direction: column;
}

.flex-column-center {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.box-sizing {
  box-sizing: border-box;
}

.bold {
  font-weight: bold;
}
.text-center {
  text-align: center;
}
